Aleutian Tern vs Kerguelen Tern
Onychoprion aleuticus مقارنةً بـ Sterna virgata
Side-by-Side Comparison
| السمة | Aleutian Tern | Kerguelen Tern |
|---|---|---|
| الاسم العلمي | Onychoprion aleuticus | Sterna virgata |
| الرتبة | Charadriiformes | Charadriiformes |
| الفصيلة | Laridae | Laridae |
| حالة الحفاظ | Vulnerable | Near Threatened |
| الطول | — | — |
| طول الجناح | 52,4 cm (20.6 in) | 50,0 cm (19.7 in) |
| الوزن | 104,88 g (3.70 oz) | 127,5 g (4.50 oz) |
| النظام الغذائي | -- | -- |
| عدد البيض في الوضع | 1-4 | 1-2 |
| Population Trend | — | — |
Habitat Comparison
حالة الحفاظ
Vulnerable
Aleutian Tern
Near Threatened
Kerguelen Tern
About These Birds
Aleutian Tern
Aleutian Tern, 32–34 cm, breeds colonially in Alaska and Russian Far East, wintering in Southeast Asian waters — one of the most poorly tracked migrations among seabirds. Dark grey above, white below, black cap with white forehead. Piscivore; dives for small fish. Near Threatened.
Kerguelen Tern
Kerguelen Tern, 31–33 cm, is restricted to a handful of sub-Antarctic islands including Kerguelen and Crozet. Darker grey than Antarctic Tern, with reddish bill. Piscivore and invertivore; forages in kelp beds and coastal waters. Near Threatened; small, isolated population vulnerable to introduced predators.